21955746741 has 8 divisors (see below), whose sum is σ = 29354097024. Its totient is φ = 14597280480.

The previous prime is 21955746719. The next prime is 21955746751. The reversal of 21955746741 is 14764755912.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21955746741 - 2¹⁰ = 21955745717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21955746751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9969720 + ... + 9971921.

It is an arithmetic number, because the mean of its divisors is an integer number (3669262128).

Almost surely, 2^21955746741 is an apocalyptic number.

It is an amenable number.

21955746741 is a deficient number, since it is larger than the sum of its proper divisors (7398350283).

21955746741 is a wasteful number, since it uses less digits than its factorization.

21955746741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19942011.

The product of its digits is 2116800, while the sum is 51.

The spelling of 21955746741 in words is "twenty-one billion, nine hundred fifty-five million, seven hundred forty-six thousand, seven hundred forty-one".